body {
    margin: 0;
    padding: 0;
    background-image: url('../image/background.jpg');
}

.selector {
    width: 644px;
    margin: 20px auto;
}

.selector .header {
    width: 644px;
    height: 50px;
}

.selecter {
    display: inline-block;
    width: 80px;
    height: 50px;
    font-size: 20px;
    margin-right: 10px;
    text-align: center;
    line-height: 50px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
}

#main {
    background-color: rgba(182, 221, 221, 0.76);
}

#extra {
    background-color: rgba(221, 187, 182, 0.76);
}

#side {
    background-color: rgba(182, 221, 192, 0.76);
}

.main {
    display: block;
    width: 644px;
    height: 564px;
    box-shadow: 10px 10px 5px #b9b8b8;
    background-color: rgba(182, 221, 221, 0.76);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
}

.extra {
    display: none;
    width: 644px;
    height: 188px;
    box-shadow: 10px 10px 5px #b9b8b8;
    background-color: rgba(221, 187, 182, 0.76);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
}

.side {
    display: none;
    width: 644px;
    height: 188px;
    box-shadow: 10px 10px 5px #b9b8b8;
    background-color: rgba(182, 221, 192, 0.76);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
}

.card {
    width: 64.4px;
    height: 94px;
    float: left;
    background-repeat: no-repeat;
    background-size: 64.4px 94px;
}